Motion of pole-dipole and quadrupole particles in non-minimally coupled theories of gravity

Details Motion of pole-dipole and quadrupole particles in non-minimally coupled theories of gravity Motion of pole-dipole and quadrupole particles in non-minimally coupled theories of gravity

2010-06-23

arxiv.org/abs/1006.4415v1

Phys.Rev. D 81, 124039 (2010)

Physics

High Energy Physics

High Energy Physics - Theory

Scientific paper

10.1103/PhysRevD81.124039

We study theories of gravity with non-minimal coupling between polarized media with pole-dipole and quadrupole moments and an arbitrary function of the space-time curvature scalar $R$ and the squares of the Ricci and Riemann curvature tensors. We obtain the general form of the equation of motion and show that an induced quadrupole moment emerges as a result of the curvature tensor dependence of the function coupled to the matter. We derive the explicit forms of the equations of motion in the particular cases of coupling to a function of the curvature scalar alone, coupling to an arbitrary function of the square of the Riemann curvature tensor, and coupling to an arbitrary function of the Gauss-Bonnet invariant. We show that in these cases the extra force resulting from the non-minimal coupling can be expressed in terms of the induced moments.

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